1) in the purchase of Corn Seeder, to buy a formal enterprise production of famous and excellent products. Advanced performance, reliable quality. Should also have a certain scale of sales to buy merchants, good reputation, service is guaranteed. Note the random “two certificates, one card, one book (promotion license, product qualification certificate, product nameplate, use manual) , ” these documents can explain whether the product is a formal product of a support, but also to guide farmers to use the product correctly and reasonably. (2) according to the specifications or sign requirements, choose and the existing power matching and hanging the same way as the planter. (3) the adaptability of machines and tools should be considered. China’s vast territory, the situation varies widely, the northeast is Ridge Sowing; north China twice a year, after the wheat harvest to no-till. The choice of machinery must therefore be based on local farming practices and technical requirements....